Conductive polymer wave-absorbing material

A technology of conductive polymers and wave-absorbing materials, applied in the field of wave-absorbing materials, can solve the problems of low conductivity, low bandgap width, no literature and patent reports, and no data on wave-absorbing performance, etc., to achieve light weight, thin coating effect

Inactive Publication Date: 2009-11-25
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent 03117132.X discloses conductive polymer polyaniline coated in magnetic particles Fe 3 o 4 , Fe 2 o 3 、Co 2 o 3 , NiO, which is conductive and magnetic, and the saturation magnetization value is given, but there is no absorbing performance data
Chinese patent 98111335.X discloses the preparation of polypyrrole/ferrite/polypyrrole composite film by electrochemical method, which has conductivity and magnetism, and the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1

[0034] 1) A water-soluble polymer polyvinyl alcohol (PVA) solution with a mass concentration of 3% is prepared by using a mixed solution of water and acetonitrile with a volume ratio of 10:1 as a solvent.

[0035]2) adding oxidant ferric trichloride in the water-soluble polymer solution prepared in step 1), stirring and dissolving, the molar concentration of ferric trichloride in the polyvinyl alcohol (PVA) aqueous solution is 0.05mol / L, to obtain trichloride A mixture of iron and polyvinyl alcohol (PVA).

[0036] 3) adding the acid dopant β-naphthalenesulfonic acid to the mixed solution obtained in step 2) under stirring conditions, the molar concentration of the acid dopant β-naphthalenesulfonic acid in the mixed solution is 0.3 mol / L, After stirring evenly, add 3,4 dioxyethylthiophene (EDOT), wherein: the molar amount of 3,4 dioxyethylthiophene (EDOT) added is 0.5 of the molar amount of ferric chloride added in step 2). times. The reaction was continuo...

Example Embodiment

[0039] Example 2

[0040] 1). Using a mixture of water and acetonitrile with a volume ratio of 5:1 as a solvent, prepare a polyvinylpyrrolidone (PVP) solution with a mass concentration of 5%.

[0041] 2). Add ammonium persulfate as an oxidant to the polyvinylpyrrolidone (PVP) solution prepared in step 1), stir and dissolve evenly, and the molar concentration of ammonium persulfate in the solution is 0.1 mol / L to obtain ammonium persulfate and polyethylene Pyrrolidone (PVP mixture.

[0042] 3) Under stirring conditions, add 3,4 dioxyethylthiophene (EDOT) to the mixed solution obtained in step 2), wherein: the molar amount of the added 3,4 dioxyethylthiophene (EDOT) is the step 2) 2 times the molar amount of ammonium persulfate added, and the reaction was continuously stirred at room temperature for 72 hours to obtain a black emulsion containing poly(3,4 dioxyethyl)thiophene (PEDOT) hollow microspheres.

[0043] 4) Dry the black emulsion in step 3) at 40° C. to obtain a dark g...

Example Embodiment

[0045] Example 3

[0046] 1) A water-soluble polymer polyvinylpyrrolidone (PVP) solution with a mass concentration of 2% is prepared by using a mixed solution of water and acetonitrile with a volume ratio of 6:1 as a solvent.

[0047] 2) Add the oxidant chloroauric acid to the water-soluble polymer solution prepared in step 1), stir and dissolve, and the molar concentration of chloroauric acid in the polyvinylpyrrolidone (PVP) aqueous solution is 0.3 mol / L to obtain chloroauric acid and polyauric acid. Mixture of vinylpyrrolidone (PVP).

[0048] 3) Under stirring conditions, add the acid dopant p-toluenesulfonic acid to the mixed solution obtained in step 2), the molar concentration of the acid dopant p-toluenesulfonic acid in the mixed solution is 0.1 mol / L, and stir evenly. Then, 3,4 dioxyethylthiophene (EDOT) is added, wherein: the molar amount of 3,4 dioxyethylthiophene (EDOT) added is 3 times the molar amount of ferric chloride added in step 2). The reaction was continu...

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Abstract

The invention belongs to the technical field of wave-absorbing materials, and in particular relates to a conductive polymer wave-absorbing material. The material consists of poly(3,4-ethylenedioxythiophene) (PEDOT) microspheres and epoxy resin or organic binder such as polyurethane and the like, wherein the content of the conductive polymer poly(3,4-ethylenedioxythiophene) microspheres in the conductive polymer wave-absorbing material is 20 to 80 percent by mass percentage. The conductive polymer wave-absorbing material has the remarkable advantages of thin coating, light weight and the like, has good wave-absorbing performance on a frequency band of between 2 and 18GHz, has the maximum absorption of 21dB at the frequency of 16GHz particularly, and has good prospect as a radar wave-absorbing material.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials, in particular to conductive polymer wave-absorbing materials. Background technique [0002] Absorbing materials are a class of materials that can absorb electromagnetic wave energy projected onto its surface and convert it into heat energy through material loss. In recent years, with the development and deepening of research on radar absorbing materials, various new types of absorbing materials have emerged, aiming to improve the survival, penetration, and especially deep strike capabilities of stealth weapons. As a new type of wave-absorbing material, conductive polymer has a good application prospect in terms of meeting the requirements of thin material (layer), light (weight), wide (frequency) and strong (absorbing performance). [0003] Conductive polymer refers to a polymer material that can conduct electricity after chemical or electrochemical doping with a л-conjugated lo...

Claims

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Application Information

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IPC IPC(8): C08L65/00C08L63/00C08L75/04H01B1/20
Inventor 胡秀杰周树云周诗怡陈萍孙承华
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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